fix(desktop): choose the available keyring under gamescope

[coah80]

Under gamescope, t3code currently forces gnome-libsecret in auto mode. On KWallet6 setups that can leave Electron without a usable encryption key, so saving a connection catalog fails.

During pre-ready startup, inspect the D-Bus service files and account wallet presence. Select KWallet6 when it is the available or configured keyring; retain GNOME Secret Service when that is the configured option. An explicit linuxPasswordStore preference still wins, including on systems with both keyrings. XDG data paths are validated as absolute, and colon-separated desktop names are supported.

Validation: 21 focused desktop tests passed; targeted lint and formatting passed. Desktop typecheck reports two pre-existing TS2883 errors in src/updates/updatesTestHarness.ts.

Model: GPT-6. Harness: Codex.

Summary by CodeRabbit

• New Features

  • Improved automatic Linux password-store selection for Gamescope sessions, including support for KWallet 6 when available.
  • Gamescope detection now works across combined desktop environment settings.
  • Explicit password-store preferences continue to take precedence over automatic detection.

• Bug Fixes

  • Improved keyring discovery by ignoring invalid relative data paths.

• Tests

  • Added coverage for Gamescope variants, KWallet 6 availability, keyring services, and environment settings.

[macroscopeapp]

Approvability

Verdict: Not approved

Macroscope's review found this PR not approvable — This PR changes the effective default password-store behavior for gamescope and adds pre-ready filesystem/environment detection that affects encrypted secret storage. An unresolved high-severity finding also identifies incorrect handling of relative XDG paths, so the change requires human review.

Not approved because:

• 1 blocking correctness issue found at or above your repo's Minimum Blocking Severity

^{Adjust the Minimum Blocking Severity for this repo — including turning it Off — in Settings. You can add or adjust custom eligibility rules. Learn more.}

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📥 Commits

Reviewing files that changed from the base of the PR and between cb407d9 and 3c058b4.

📒 Files selected for processing (4)

• apps/desktop/src/app/DesktopEarlyElectronStartup.test.ts
• apps/desktop/src/app/DesktopEarlyElectronStartup.ts
• apps/desktop/src/linuxSecretStorage.test.ts
• apps/desktop/src/linuxSecretStorage.ts

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📝 Walkthrough

Walkthrough

Gamescope detection now accepts colon-separated desktop values. Early Linux startup checks KWallet6 service and wallet files using absolute XDG paths. Automatic selection uses kwallet6 when available. Explicit preferences and non-Gamescope desktops retain existing behavior.

Changes

Gamescope password-store selection

Layer / File(s)	Summary
Password-store resolution rules apps/desktop/src/linuxSecretStorage.ts, apps/desktop/src/linuxSecretStorage.test.ts	isGamescopeDesktop recognizes trimmed entries in colon-separated XDG_CURRENT_DESKTOP values. Automatic selection returns kwallet6 when Gamescope reports KWallet6 availability. Explicit preferences and non-Gamescope desktops retain existing behavior.
Gamescope availability detection apps/desktop/src/app/DesktopEarlyElectronStartup.ts, apps/desktop/src/app/DesktopPreReadyPlatform.ts, apps/desktop/src/app/DesktopEarlyElectronStartup.test.ts	Early Linux startup accepts synchronous file checks, ignores relative XDG data paths, and checks D-Bus services, GNOME_KEYRING_CONTROL, and the KWallet database. Tests cover Gamescope variants and relative-path handling.

Priority: ⬇️ Low

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Bug fix

Sequence Diagram(s)

sequenceDiagram
  participant DesktopPreReadyPlatform
  participant resolveEarlyLinuxElectronOptions
  participant gamescopeHasKwallet6
  participant resolveLinuxPasswordStoreSwitch
  DesktopPreReadyPlatform->>resolveEarlyLinuxElectronOptions: provide fileExists and readFileString
  resolveEarlyLinuxElectronOptions->>gamescopeHasKwallet6: inspect Gamescope environment and files
  gamescopeHasKwallet6-->>resolveEarlyLinuxElectronOptions: return KWallet6 availability
  resolveEarlyLinuxElectronOptions->>resolveLinuxPasswordStoreSwitch: pass availability
  resolveLinuxPasswordStoreSwitch-->>DesktopPreReadyPlatform: return selected password store

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Merge Risk: ⚪ Minimal · up to 3c058

The change is mergeable based on the supplied implementation summaries and prior resolved review context.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 16.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 6 functions across 5 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly and concisely describes the main change: selecting the available keyring under gamescope.
Description check	✅ Passed	The description explains the problem, implementation, precedence rules, XDG path validation, desktop-name handling, and validation results. It does not reproduce the template headings or checklist, bu…

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Inline comments:
In `@apps/desktop/src/linuxSecretStorage.ts`:
- Around line 42-56: Update resolveLinuxPasswordStoreSwitch and the related
auto-mode detection to recognize “gamescope” as one entry in the colon-separated
XDG_CURRENT_DESKTOP list, reusing the existing desktop-list parsing helper if
available. Preserve explicit preferences and the gamescopeKwallet6Available
check while ensuring values such as “gamescope:niri” select kwallet6 when
available.

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📥 Commits

Reviewing files that changed from the base of the PR and between 242816a and cb407d9.

📒 Files selected for processing (5)

• apps/desktop/src/app/DesktopEarlyElectronStartup.test.ts
• apps/desktop/src/app/DesktopEarlyElectronStartup.ts
• apps/desktop/src/app/DesktopPreReadyPlatform.ts
• apps/desktop/src/linuxSecretStorage.test.ts
• apps/desktop/src/linuxSecretStorage.ts

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